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SEKOIA_Tool_Edrsandblast_Kernelcallbacks

Detects EDRSandblast KernelCallbacks strings

Hack toolSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2024-11-25
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects EDRSandblast KernelCallbacks strings

Targets: Windows PE.

It defines 3 patterns (3 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

tool-edrsandblast-kernelcallbacks.yarDetection Rule License 1.1
rule SEKOIA_Tool_Edrsandblast_Kernelcallbacks : FILE
{
	meta:
		description = "Detects EDRSandblast KernelCallbacks strings"
		author = "Sekoia.io"
		id = "74cf4444-5bd6-4167-930a-5dbf2e529f92"
		date = "2024-11-25"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/tool_edrsandblast_kernelcallbacks.yar#L1-L19"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "ffb1185dca42c5b2b273c3a48f3ba86204a3474a9a045f72dbdb0ba7c9e89c7d"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "[+] '%s' service ACL configured to for Everyone" wide
		$ = "%s callback of EDR driver \"%s\" [callback addr: 0x%I64x" wide
		$ = "[!] Could not resolve %s kernel module's address" wide

	condition:
		uint16be( 0 ) == 0x4d5a and filesize < 3MB and 3 of them
}

Strings (3 patterns)

IdentifierTypeValueModifiers
$text"[+] '%s' service ACL configured to for Everyone"wide
$text"%s callback of EDR driver \"%s\" [callback addr: 0x%I64x"wide
$text"[!] Could not resolve %s kernel module's address"wide

Condition

uint16be( 0 ) == 0x4d5a and filesize < 3MB and 3 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • The file must be smaller than 3MB (a cheap guard that skips large files).
  • At least 3 patterns in the rule must match.

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References

Licence & attribution

Author: Sekoia.io

Source repository: SEKOIA.IO Community @ a438a5901a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 74cf4444-5bd6-4167-930a-5dbf2e529f92

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE